1681232505 has 16 divisors (see below), whose sum is σ = 2697310464. Its totient is φ = 894211200.

The previous prime is 1681232473. The next prime is 1681232507. The reversal of 1681232505 is 5052321861.

It is not a de Polignac number, because 1681232505 - 2⁵ = 1681232473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1681232507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147196 + ... + 158205.

It is an arithmetic number, because the mean of its divisors is an integer number (168581904).

Almost surely, 2^1681232505 is an apocalyptic number.

1681232505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1681232505 is a deficient number, since it is larger than the sum of its proper divisors (1016077959).

1681232505 is a wasteful number, since it uses less digits than its factorization.

1681232505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305776.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 1681232505 is about 41002.8353287916. The cubic root of 1681232505 is about 1189.0750303440.

The spelling of 1681232505 in words is "one billion, six hundred eighty-one million, two hundred thirty-two thousand, five hundred five".